Design of C+L-band broad gain-flattened bismuth-basederbium-doped fiber amplifier
-
-
Abstract
Inordertomeetthedevelopingneedsofbroadamplificationaswellasgain-flattened
operationforfiberamplifier,adouble-passstructureofbismuth-basederbium-dopedfiberamplifier(Bi-
EDFA)withtheincorporationofC-band(1530-1565nm)broadfiberBragggrating(FBG)inbetweenthe
twocascadedsegmentsofbismuth-basederbium-dopedfiber(Bi-EDF)wasdesigned,andtheamplifying
performancesofBi-EDFAwerepresentedtheoretically.Theresultsindicatethatabroadamplification
andgain-flattenedspectrumcanbeachievedwiththeaidofthesimultaneouslyobtainedhighgainofthe
C-bandandL-band(1570-1620nm)signalsduetotheirexperiencingadifferentlengthbi-directional
transmissioninBi-EDFaftertheincorporationofFBG.Againbandwidthof90cmwithaveragegain
35.7dBandgainvariationofapproximatelyupanddown2.3dBwithinthewavelengthrangefrom1530nmto1620nm
areobtainedundertheconditionsofthe1480nmbi-directionalsymmetricalpumpingwithpumppower
of200mW,thefirstandsecondBi-EDFlengthof50cmand170cm,and56-channelsignalsofC+L
bandwithintervalof2nmandeachpowerof-30dBmareinputtedsimultaneously.Meanwhile,thenoisefigureofBi-EDFAisimprovedevidently.Thetheoreticalstudieswillprovidepracticalsignificancefora
newdesignofC+L-bandBi-EDFAwithbroadandflattenedgain.
-
-
DownLoad: